Screw Down Wire Terminal vs. Wago Cage Clamp Wire Terminal

Let’s talk about the battle between the screw terminal and the Wago cage clamp. Why do people choose one or the other? Let’s just look at some of the basic facts.

On the screw terminal, when you strip a wire and insert it into a screw terminal, the tightest that that’s ever going to be is the connection at the time you actually torque that screw driver down. From that point on it’s only ever going to get looser. Now when you talk about Wago cage clamp terminal, when you strip the wire and insert it into the cage clamp, that’s actually the loosest that connection ever is. And as that wire then starts to take the shape of the terminal and the wires kind of splay out and basically mold to the shape of the terminal, it’s actually going to get tighter over time because of the spring force that’s holding that wire in place.

So, with temperature cycling — as that wire has current running through it and it heats up and cools down and heats up and cools down — it’s going to be expanding and contracting. With the screw terminal, that’s only going to force that screw to back out and get looser and looser over time, whereas with the cage clamp with its spring technology, the spring actually compensates. As the wire expands, it expands, when the wire shrinks back it shrinks back with it and so it always maintains the right amount of tension on the wire for the application.

Now there’s also industrial applications where there’s typically a lot of vibration. With a screw, we all know what happens when it’s around vibration; they tend to loosen up. With the cage clamp, vibration typically doesn’t matter. It moves and it adjusts and responds to the vibration without coming loose over time.

Now think about what it costs if you’re having to install hundreds of terminals in a given control panel. If you’re having to screw and tighten down each and every terminal, that’s going to take quite a bit of time. But with the cage clamp, all you basically do is insert a screwdriver, insert your wire, remove the screwdriver and it’s done. You get the same great connection every time. The other thing to consider is first thing in the morning when you’re fresh, you’re probably going to be tightening down those screws a lot tighter than the last one at the end of the day when you’re kind of tired. So you get a variation of how tight those wires are. And so then what ends up happening is once that panel gets installed in a machine, you’re going to start having loose connections and that’s going to potentially cause a machine to go down and cost extra money.

So you always want to make sure that you use the right product for the right application. In the case where you have temperature cycling and vibration and you’re looking for the most efficient and best cost to connect your wires Wago

cage clamps are definitely the leg up.

So if you’d like to learn more about cage clamps and how Innovative-IDM can help you please visit our website innovativeidm.com. We are Home of the Legendary Customer Experience.